Captain Bordure

Bourdure kills King Venceslas of Poland, paving the way for Pere Ubu to become the king. Later, Bordure abandons Ubu, goes over to the Russians, and plots the death of Pere Ubu and the reclamation of the Polish throne by Bougrelas with the czar. Pere Ubu recognizes Bordure in the middle of the battle, and, the stage directions indicate, tears him to pieces.

Bougrelas

Bougrelas is the sole surviving son of King Venceslas and Queen Rosemonde. He escapes from the battle with Pere Ubu, receives a visit from all his dead ancestors demanding vengeance, and eventually defeats Pere Ubu and regains the crown.

Queen Rosemonde

Queen Rosemonde tries to warn King Venceslas by recounting one of her dreams. In the dream, Ubu kills Venceslas and becomes King of Poland. During the battle, the queen escapes down the secret stairway with her son, Bougrelas, but dies shortly after...